Steam-boiler.



Patented 0613. 8, 1918 4 SHEETSSHEET 2 Mdrromns.

D. S. JACOBUSV STEAM BOILER.

APPLICATION FILED 0019. um.

Patented Oct. 8, 1918.

4 SHEETS-SHEET 3- DAVID S. JACOBUS, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO THE BABGOCK &

-WILCOK COMPANY, JERSEY.

STEAM-BOILER.

specification of Letters Patent.-

Patented Oct. s, 1918.

Application filed 0ctober9, 1917: Serial No. 195,540. I

longitudinal sections showing various-modi fications of the invention; Fig. 4 a section on the plane of the line 4'l of Fig. 5 and on an enlarged scale; Fig. 5 a face view of one of the bafile plates of Fig. 4; Fig. 6 a section showing the relation of the battle and yielding seal to the bridge wall and,

the mud drum; Fig. i a detailed sectional View of a tube clamp and gas seal; and Fig. 8 a top view and a section of a modified form of plate which may be used instead of the plates of Fig. 1. Similar reference numerals indicate similar parts in the several views.

Referring to Figs. 1, *1, 5 and 7, the boiler shown comprises three transverse steam and water drums 1. 2 and 3 connected by banks of tubes 4, 5 and 6 to a mud drum 7-. I may use a single mud drum as shown, or a series of connected mud drums.and I intend to cover both constructions by the words lower chamber in the claims. The three upper drums must, however, be connected to this chamber whether it is in the form of one drum or several connected drums. The steam spaces of the front and middle upper drums are connected by cireulators 8,

' and the steam spaces of the middleand rear upper drums are connected by circulators 9.

The water spaces of the front and middle drums are connected by eirculators 10 which support tiling 11, as shown. In this form there are no water circulators between the middle and rear upper drums. A bafile 12 is supported upon the second row of tubes of the front bank 4' and extends upwardly from a cross bafile 13 at the rear of the bridge wall 14. In the middle bank of tubes are two bafiies 15 and 16, the former being at the front of the bank and extending downwardly from the middlesteam and water drum, and the latter supported .upon the rear row of tubes and extending upwardly from the mud drum, these battles being so arranged as to provide an up-pass for the gases in the middle bank. baflle 17 is supported upon tube clamps between the front and middle banks at the lower end of the baffle 15. A cross bafile or shelf 18 extends'from the baffle 16 toward the rear bank of tubes. The gases flow upwardly along the tubes in front of baflle 12, crossing the front bank of tubes at the upper end thereof, thence in a general downward direction along and among the tubes at the rear of baffle 12-, thence upwardly along the tubes of the middle bank. and-finally downward among the tubes of the rear bank to the outlet flue l9.

By placing the baflle 12, which comes nearest the tire, back of the second or third row of tubes, I am enabled to maintain a lower furnace temperature than would existby placing said bafiie back of the first line of tubes. The boiler is shown as fired by an underfeed stoker 20, the'bafile arrangement described being particularly adapted to that type .of stoker by reason of the fact A cross that it is operated by a forced blast and pro duces a high furnace temperature. The arrangement is also adapted to other types of stokers and its use is not limited to underfeed stokers.

Bycmploying the cross bafiie 13 I am enabled to make use of a dust pocket 14: at the rear of the bridge wall '14. The opening 13 is' left between the baffle 13 and the mud drum and the soot and ashes which are deposited from the gases fall through the opening 13 into the dust pocket-14.

If desired, a superheater may be placed in the triangular space between the front and middle banks of tubes. In the form shown in Fig. 1 the superheater comprises the boxes 21 and 22 to which the upwardly extending U tubes 23 are connected, The boxes are supported in saddles resting upon the cross beam 2% forming part of the struc I tural work of the setting. The tubes 23 extend substantially parallel with the tubes of the middle bank. Clamps secured to the front row of tubes 'of the middle bank serve as supports for resisting the overturning m0- ment of the superheater. In the steam space of the middle upper drum is a dry pipe 25 from which the steam is delivered to the trough the water is distributed longitudinally in the drum.

Direct impingement of the gases upon the rear steam and water drum, and protection. of the butt-straps 29 and 30 is afforded by a special bafile 31 extending from the middle steam and water drum at a point below the butt-strap 29, to substantially the underside of the rear upper drum below the butt-strap 30. This baille is. preferably of cast iron, made up in sections, and supported from above by rods 32.

In Fig. 2 l have shown a modified arrangement in which the bailie i2 is supported. upon. the third row of tubes of the front bank. Also, I have provided a bafile 3% for the rear bank oftubes extending downwardly from the rear upper drum so as to give a downpass for the gases after they leave the middle bank of tubes, and annp-pass at the rear of bafile 3a to the outlet flue 35. In this form I have omitted the'cross bafiles 17 and 18, and also the superheater of Fig. 1. I prefer, however, in this form, with the baffle 12 supported upon the third rower tubes of the front bank, to use an arch 36 extending from the front wall of the setting above the stolrer.

lln Fig. 3 l have shown the same bafiing for the front andniiddle banks of tubes as in Fig. 1 except that l have omitted the cross bafile 17. I provide the rear bank with a bathe 37 so that the gases after flowing downwardly over the tubes of the rear bank flow upwardly back of the rear bank to the flue outlet 35. In this form all of the steam is delivered to the rear upper drum 3 from which it is taken through the steam main 38 to the superheater.

In Figs. 4 to i l have shown the details of a special bslile and ielding seal between the lower end of the be e 12 andbridge wall 14. This bailie is made up of cast iron plates 38 fitted around the tubes from side to side of the boiler with sullicient clearance to permit of their ready installation and to permit tubes being removed without disturbing the bathe. The inner ends of the plates 38 rest upon an angle iron 39 supported by the front ends of the tube clamps l0 upon which the bafile 12 rests. The outer ends of the plates 38 rest upon clamps 41 upon the asawis in front of the tube can be removed as well as the plates 38 which surround the tube and the tube can be removed and replaced without disturbing the bathe 12. A layer of ganister and fire clay or similar material 42, applied in a plastic state upon the plates 38, serves to protect them and ail'ords a gas tight seal. The clamps a l are formed with a lip, as shown in Figs. 6 and '7, upon which rests, atone end, a series of overlapping plates 43. These overlapping plates are an improvement on those shown and described in my application Serial 55,771, filed Oct. 14th, l5, for steam boilers, in. which application the plates were not made to overlap. The overlapping or". the plates is an important element in securing tightness, as the dust and soot which collects on the plates will become firmly embedded between the overlapped plates thus leading to a. much lighter seal than is secured where the plates simply abut at their edges, The other end oi these plates rests upon bridge wall 1%, the plates as a whole forming a yielding seal which allows relative movement between the seal and the bridge wall without destroying the seal. In addition to this seal I may also introduce a similar sea-l as between the mud drum 7 and the floor, as shown iii-Figs. 1, 2 and 3. These seals are described in m application, Serial NO. 55,771 filed October 14,1915.

in Fig. 8 l have shown overlapping plates 46 which may be used instead of the plates 38 for the bafie between the lower end. of battle 12 and the yielding seal.

What I claim and desire to secure by Letters Patent of the United States is 1. A steam boiler comprising a bank of generating tubes, upper and lower drums into which said tubes are expanded, a longitudinal bathe in said bank to direct the course of the gases, a furnace having a bridge wall, a cross baille extending from said longitudinal batlle, and a yielding seal between said cross bathe and said bridge wall.

A steam boiler comprlslng a bank of generating tubes, upper and lower drums into which said. tubes are expanded, a longitudinal baffle in said bank to direct the course of the gases across said bank at the upper part thereof, a furnace having a "bridge wall, a cross battle extending from said longitudinal bailie, ayielding seal between saidbafile and bridge wall, and a dust pocket in the rear of the bridge well below said cross baffie and seal.

3. A steam boiler comprising a bank of generating tubes, upper and lower drums into which said tubes are expanded, a lon itudinal baflle to direct the course of t e gases across said bank at the upper part thereof, afurnace bridge wall 111 front of said lower drum, 2. cross baflle extending bank 6% r drums a l i rose; said :Iurnace drum :1. mgitudi- M of the bridge wail below saicl crossbafiie said crass baffle bemg so arranged that it can be relgp gigggl replac efi ather in whole; or m from said longitudinal bafiie, ind a yielding seaglbetween said crass baffle and said bridge Wa 5. A steam boiler comprising a generating tubes, upper and. Rowe: 2 into which said tubes are expanded, tudinal baifie to cause the gases to 0: bank at the upper part; thereof, a bridge wall in front of said lower cross bafie extending from said 10 25 nal bafiie and a dust pocket at the re:

In testimonj w hi'f I haw hre ingej signed my name inthe presence of 'zwo subscribing witnesses.

DAVID s. JAGOBU$.

'- Witnesses:

' JOHN A. W. DIXON, H. J. HASBROUCK. 

